Spring compressor



Oct. 30 1923. 1,472,752

l c N. GRAVES SPRING COMPRESSOR Filed Jan. 14. 1922' 2 sheets-sheet 1 WITNESS:

ATTO R N EY Oct. 30 1923.-

WITNESS:

1,472,752v C. N. GRAVES SPRING COMPRESSOR Filed Jan. 14, 1922 2 Sheets-Sheet 2 BY @age/ ATTO RNEY Patented oet. so, i923.

FICE,

CHARLES N. GRAVES, OF SHREVEPORT, LOUISIANA, ASSIGNOR TO THE GRAVES TOOL CO., INC., OF SHREVEPORT, LOUISIANA, A CORPORATION OF LOUISIANA. n

SPRING COMPRESSOR.

Application mea January 1a, 1922. serial No. 529,212.

To all whom t 'may concern:

Be it known that I, CHARLES N. GRAVES, a citizen of the United States, residing at Shreveport, in the parish of Caddo and 5 State of Louisiana, have-invented new and useful Improvements in Spring Compressors, of` which the following is a specication.

My present invention has reference to a means for compressing the springs on the valve stems of automobiles to permit of the sustainingv means for the springs 'and for freeing the valve vfrom the stem to permit of the grinding of the valve or the removal thereof from its seat.

The primary object of the invention is to produce a tool for this purpose which can readily be adjusted to act on different sized valves and springs and which will compress the spring in an easy and expeditious man# ner without danger of breaking the stem.

A still further object is to produce a valve spring compressor by the use of which the spring can be compressed to any desired 26 predetermined degree.

A still further object is to produce a valve compressor in which the body portion thereof is in the nature of an angle frame that has its lower ofset end provided withad- 30 justable jaws whereby the same can straddle valve stems of varying diameters to engage with the lower convolution of the spring thereon, while movable through the upper end of the frame is a plunger spring influenced in an outward direction and having swiveled on its lower end a concaved head which is arranged over the valve, the said plunger being movable through astandard association with the frame, the said plunger 4o having its outer end biurcated and provided with spaced openings'through any one o y which thereis passed apivot pin that also passes through any one of a plurality of staggered openings in the lat peripherally round head of the operating handle, the periphery of the said head being in contact with a ro-ller associated with the plunger, and a downward swinging of the handle will move the frame upwardly, causing theY jaws atk the lower end of the frame to compress the spring to permit of the operator readily removing the means which secure the spring on the valve stem, and thus disassociate the spring and stem to permit of tile grindingV or the removal of the valve.

*thereof is in the nature of anangle frame.

Vsuitable distance from the jaw 'being The drawings illust-rate a satisfactoryem bodiment of V the improvement reduced to practice, and wherein i Figure l is a view illustrating the operation of the improvement.

, Figure 2 is a greatly enlarged side elevation of the impro-vement.

Figure 3 is a sectional view on 3-3 of F igure'2. y

Figure 4 is a sectional view'on the line k 1-4e of Figure 3.

Figure 5 isa sectional view 5-5 of Figure 2. .Y

Figure 6 is a sectional viewl on the line 6-6 of Figure 2. Y

Figure 7 is a sectional -view on the `line 7 7 of Figure 5.` Y Y e y improvement is preferably constructed entirely of metal, and the body portion Vthe line on the line The lower Vend of the frame is flat and`ofl'set",' and is likewise reduced to provide a jaw 1. From the jaw, the 'frame is continued at' an upward and outward angle, as indicated, by the numeral 2, the said angle portion, at a arranged at an inward angle parallel with the `jaw. This last mentioned portion is indicated by the numeral 3 and is provided, ad jacent its end, with an opening which is surrounded by an outstanding tubular standard 4e. The bore of the standard and-the opening through the portion 3 of the frame align, and the standard, from its outer end is centrally cut away or bifurcated j in a Vline parallel to the plane of the upper portion 3 of the frame. This bifurcationv provides the upper end of the standard with spaced arms 5 respectively, and the saidVV arms have a plurality of'spaced aligning o-penings 6 95 therethrough.

Slidable in the standard and through the opening at the upper portion 3 of the frame there is a cross sectionally rounded plunger 7. The plunger has its, end which extends 100 through the opening in the upper portion 3 of the frame reduced and formed with a ball head 8 that is received ina spherical pocket 9 in a head member 10.V The headhas its upper portion formed with a nec-k l1 which 105 is bent over the upper portion of the ball head 8, so that the headlO is swiveledA on the plunger. The head is round in cross section, and the lowercr outer face theree ofis concaved,ras at'12. The upper end im of the plunger 7 is bi'furcated in a line with the biturcated portion of the standard, and between the arms 18 thus provided there is journaled a roller 1e. Below the roller there is Vpassed through the plunger a pin 15 which is of a greater length than the thickness of the plunger, and surrounding the standard, contacting with the pin 15 and rest-ing on the wall or shoulder provided by the upper portion 8 of the frame at the juncture of the tubular standard 4 therewith there is a` coiled spring 16. The spring thus iniiuences the plunger in an upward or outward direction through the tubular standard. f rIhe head1() of the plunger' is of a greater cross sectional diameter than that of theplunger, and consequently willi be brought to contact with the under tace of the upper portion of the frame by the influence of the spring and 'so limit the upward or outward movement of the plunger.

The operating handle for the device is indicated by the numeral 17, the samerhaving one of its ends provided with a. fiatperipherally rounded head 18, and this headV is received in the biturcated upper end of the tubular standard 4. The head 18 is provided with any desired number of staggered openings 19 therethrough, any one of which designed to be brought to align with the registering openings 6 in the arms 5, of the standard, and through Jthese aligning openings there is passsed a removable pin 20. In this manner, it will be noted that the head 18 may be adjusted with respect to the roller 14, and that the arrangement permits of a determined movement of the plunger against the pressure of its spring, on the operation of the handle 17 in a direction toward the frame. As a consequence, the spring 21 on the stem 22 of a valve 23 in an engine head 24 may be compressed to a desired extent.

As previously stated, the jaw 1 is offset with respect to the frame. The frame, inward of the jaw is formed with a longitudinal notch 25 on the side thereof opposite the jaw. From the outer side and adjacent the ends of the notch there are projected two pins 26 respectively, and between the pins there is a threaded opening. The shank or body portion 27 of a movable jaw 28 is provided with openings through which the pins 26 pass and with a central opening that aligns with the referred to threaded opening in the notch portion of the trame. The outer face of the shank or body 27 is reamed in aline with the last mentioned Vopening to provideV for the reception of the head 29 of a screw 30, the said screw passing through the said opening and engaging the threads in the referred to opening in the frame. ySurrounding the shank of the screw,

and exerting a pressure between the wall of the notch 25 and the inner wall of the shank or body of the movable jaw 28 there is a spring 31. The head 29 of the screw is, ot' course, kert'ed and by the employment of a suitable instrument, the screw can be turned, and in turning will adjust the movable aw with respect to the stationary jaw, with the result that varying sizes of valve stems may be received between the jaws. The pins 26 not only serve as guides for the movable jaw but also as bracing or reinforcing elements thereifor when a spring is engaged between the j aws.

It is believed that the foregoing description, when taken in connection with the drawings will fully set :t'orth the construe tion, operation and advantages of the improvement to those skilled in the art to which such inventions relate without further detailed description, but it is thought necessary to add that I am not to be re stricted to the precise structural features -herein set forth vbut may, in the manufacture of my improvement resort to such changes and modifications as fall within the scope of what I claim.

It is to be noted that with the improvement, compressive force is obtained through the use of the eccentrically mounted head operating against the wheeledframe, which is in ycounter-distinction to ordinary valve litters that .employ the screw and lever principle, and also that after the compressing operation is completed, the device is selflocking, or in other words the eccentrically mounted pin is automatically held against movement when the plunger has been operated thereby, so that the employment of triggers, ratchets, pins, etc., is not required with the device.

Having described the invention, I claim 1. An angle frame having its lower end offset to provide a jaw, a second jaw opposite the first mentioned jaw, guide means for the last mentioned jaw, means Jfor ad justing the last mentioned jaw with respect to the first mentioned jaw, a hollow standard on the upper portion vof the frame in a line with the jaw, a plunger movable in the standard and through the upper portion of the frame, a swiveled head on the lower end of the plunger below the frame, a roller journaled in the upper end of the plunger, spring means between the frame and plunger influencing the latter outward through the standard, and swingable means adjustably associated with the standard for contacting the roller to move the plunger in an opposite direction.

2. An angle frame, jaws .one adjustable with respect to the other on the lower end of the frame, a tubular standard having an outer biturcated and apertured portion on the upper end of the frame in a line with the jaws, a cross sectionally rounded` plunger movable in the standard and rounded head received in the' bifurcated 1o portion of the standard, said head having staggered openings therethrough, f one of which designed to be brought to align with certain of the apertures in the standard, andk a pin passing through these aligning aper- 15 tures, as and for the purpose set forth.

In testimony Whereofl aix my signature.

CHARLES N. GRAVES. 

